--- /dev/null
+/*
+ * OpenPIC emulation
+ *
+ * Copyright (c) 2004 Jocelyn Mayer
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+/*
+ *
+ * Based on OpenPic implementations:
+ * - Intel GW80314 I/O compagnion chip developper's manual
+ * - Motorola MPC8245 & MPC8540 user manuals.
+ * - Motorola MCP750 (aka Raven) programmer manual.
+ * - Motorola Harrier programmer manuel
+ *
+ * Serial interrupts, as implemented in Raven chipset are not supported yet.
+ *
+ */
+#include "vl.h"
+
+#define DEBUG_OPENPIC
+
+#ifdef DEBUG_OPENPIC
+#define DPRINTF(fmt, args...) do { printf(fmt , ##args); } while (0)
+#else
+#define DPRINTF(fmt, args...) do { } while (0)
+#endif
+#define ERROR(fmr, args...) do { printf("ERROR: " fmr , ##args); } while (0)
+
+#define USE_MPCxxx /* Intel model is broken, for now */
+
+#if defined (USE_INTEL_GW80314)
+/* Intel GW80314 I/O Companion chip */
+
+#define MAX_CPU 4
+#define MAX_IRQ 32
+#define MAX_DBL 4
+#define MAX_MBX 4
+#define MAX_TMR 4
+#define VECTOR_BITS 8
+#define MAX_IPI 0
+
+#define VID (0x00000000)
+
+#define OPENPIC_LITTLE_ENDIAN 1
+#define OPENPIC_BIG_ENDIAN 0
+
+#elif defined(USE_MPCxxx)
+
+#define MAX_CPU 2
+#define MAX_IRQ 64
+#define EXT_IRQ 16
+#define MAX_DBL 0
+#define MAX_MBX 0
+#define MAX_TMR 4
+#define VECTOR_BITS 8
+#define MAX_IPI 4
+#define VID 0x03 /* MPIC version ID */
+#define VENI 0x00000000 /* Vendor ID */
+
+enum {
+ IRQ_IPVP = 0,
+ IRQ_IDE,
+};
+
+#define OPENPIC_LITTLE_ENDIAN 1
+#define OPENPIC_BIG_ENDIAN 0
+
+#else
+#error "Please select which OpenPic implementation is to be emulated"
+#endif
+
+#if (OPENPIC_BIG_ENDIAN && !TARGET_WORDS_BIGENDIAN) || \
+ (OPENPIC_LITTLE_ENDIAN && TARGET_WORDS_BIGENDIAN)
+#define OPENPIC_SWAP
+#endif
+
+/* Interrupt definitions */
+#define IRQ_FE (EXT_IRQ) /* Internal functional IRQ */
+#define IRQ_ERR (EXT_IRQ + 1) /* Error IRQ */
+#define IRQ_TIM0 (EXT_IRQ + 2) /* First timer IRQ */
+#if MAX_IPI > 0
+#define IRQ_IPI0 (IRQ_TIM0 + MAX_TMR) /* First IPI IRQ */
+#define IRQ_DBL0 (IRQ_IPI0 + (MAX_CPU * MAX_IPI)) /* First doorbell IRQ */
+#else
+#define IRQ_DBL0 (IRQ_TIM0 + MAX_TMR) /* First doorbell IRQ */
+#define IRQ_MBX0 (IRQ_DBL0 + MAX_DBL) /* First mailbox IRQ */
+#endif
+
+#define BF_WIDTH(_bits_) \
+(((_bits_) + (sizeof(uint32_t) * 8) - 1) / (sizeof(uint32_t) * 8))
+
+static inline void set_bit (uint32_t *field, int bit)
+{
+ field[bit >> 5] |= 1 << (bit & 0x1F);
+}
+
+static inline void reset_bit (uint32_t *field, int bit)
+{
+ field[bit >> 5] &= ~(1 << (bit & 0x1F));
+}
+
+static inline int test_bit (uint32_t *field, int bit)
+{
+ return (field[bit >> 5] & 1 << (bit & 0x1F)) != 0;
+}
+
+enum {
+ IRQ_EXTERNAL = 0x01,
+ IRQ_INTERNAL = 0x02,
+ IRQ_TIMER = 0x04,
+ IRQ_SPECIAL = 0x08,
+} IRQ_src_type;
+
+typedef struct IRQ_queue_t {
+ uint32_t queue[BF_WIDTH(MAX_IRQ)];
+ int next;
+ int priority;
+} IRQ_queue_t;
+
+typedef struct IRQ_src_t {
+ uint32_t ipvp; /* IRQ vector/priority register */
+ uint32_t ide; /* IRQ destination register */
+ int type;
+ int last_cpu;
+ int waited_acks;
+} IRQ_src_t;
+
+enum IPVP_bits {
+ IPVP_MASK = 31,
+ IPVP_ACTIVITY = 30,
+ IPVP_MODE = 29,
+ IPVP_POLARITY = 23,
+ IPVP_SENSE = 22,
+};
+#define IPVP_PRIORITY_MASK (0x1F << 16)
+#define IPVP_PRIORITY(_ipvpr_) (((_ipvpr_) & IPVP_PRIORITY_MASK) >> 16)
+#define IPVP_VECTOR_MASK ((1 << VECTOR_BITS) - 1)
+#define IPVP_VECTOR(_ipvpr_) ((_ipvpr_) & IPVP_VECTOR_MASK)
+
+typedef struct IRQ_dst_t {
+ uint32_t pctp; /* CPU current task priority */
+ uint32_t pcsr; /* CPU sensitivity register */
+ IRQ_queue_t raised;
+ IRQ_queue_t servicing;
+ CPUState *env; /* Needed if we did SMP */
+} IRQ_dst_t;
+
+typedef struct openpic_t {
+ PCIDevice pci_dev;
+ /* Global registers */
+ uint32_t frep; /* Feature reporting register */
+ uint32_t glbc; /* Global configuration register */
+ uint32_t micr; /* MPIC interrupt configuration register */
+ uint32_t veni; /* Vendor identification register */
+ uint32_t spve; /* Spurious vector register */
+ uint32_t tifr; /* Timer frequency reporting register */
+ /* Source registers */
+ IRQ_src_t src[MAX_IRQ];
+ /* Local registers per output pin */
+ IRQ_dst_t dst[MAX_CPU];
+ int nb_cpus;
+ /* Timer registers */
+ struct {
+ uint32_t ticc; /* Global timer current count register */
+ uint32_t tibc; /* Global timer base count register */
+ } timers[MAX_TMR];
+#if MAX_DBL > 0
+ /* Doorbell registers */
+ uint32_t dar; /* Doorbell activate register */
+ struct {
+ uint32_t dmr; /* Doorbell messaging register */
+ } doorbells[MAX_DBL];
+#endif
+#if MAX_MBX > 0
+ /* Mailbox registers */
+ struct {
+ uint32_t mbr; /* Mailbox register */
+ } mailboxes[MAX_MAILBOXES];
+#endif
+} openpic_t;
+
+static inline void IRQ_setbit (IRQ_queue_t *q, int n_IRQ)
+{
+ set_bit(q->queue, n_IRQ);
+}
+
+static inline void IRQ_resetbit (IRQ_queue_t *q, int n_IRQ)
+{
+ reset_bit(q->queue, n_IRQ);
+}
+
+static inline int IRQ_testbit (IRQ_queue_t *q, int n_IRQ)
+{
+ return test_bit(q->queue, n_IRQ);
+}
+
+static void IRQ_check (openpic_t *opp, IRQ_queue_t *q)
+{
+ int next, i;
+ int priority;
+
+ next = -1;
+ priority = -1;
+ for (i = 0; i < MAX_IRQ; i++) {
+ if (IRQ_testbit(q, i)) {
+ if (IPVP_PRIORITY(opp->src[i].ipvp) > priority) {
+ next = i;
+ priority = IPVP_PRIORITY(opp->src[i].ipvp);
+ }
+ }
+ }
+ q->next = next;
+ q->priority = priority;
+}
+
+static int IRQ_get_next (openpic_t *opp, IRQ_queue_t *q)
+{
+ if (q->next == -1) {
+ if (q->queue == 0) {
+ /* No more IRQ */
+ return -1;
+ }
+ IRQ_check(opp, q);
+ }
+
+ return q->next;
+}
+
+static void IRQ_local_pipe (openpic_t *opp, int n_CPU, int n_IRQ)
+{
+ IRQ_dst_t *dst;
+ IRQ_src_t *src;
+ int priority;
+
+ dst = &opp->dst[n_CPU];
+ src = &opp->src[n_IRQ];
+ priority = IPVP_PRIORITY(src->ipvp);
+ if (priority <= dst->pctp) {
+ /* Too low priority */
+ return;
+ }
+ if (IRQ_testbit(&dst->raised, n_IRQ)) {
+ /* Interrupt miss */
+ return;
+ }
+ set_bit(&src->ipvp, IPVP_ACTIVITY);
+ IRQ_setbit(&dst->raised, n_IRQ);
+ if (priority > dst->raised.priority) {
+ IRQ_get_next(opp, &dst->raised);
+ DPRINTF("Raise CPU IRQ\n");
+ cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HARD);
+ }
+}
+
+void openpic_set_IRQ (openpic_t *opp, int n_IRQ, int level)
+{
+ IRQ_src_t *src;
+ int i;
+
+ src = &opp->src[n_IRQ];
+ if (!test_bit(&src->ipvp, IPVP_MASK)) {
+ /* Interrupt source is disabled */
+ return;
+ }
+ if (IPVP_PRIORITY(src->ipvp) == 0) {
+ /* Priority set to zero */
+ return;
+ }
+ if (src->ide == 0x00000000) {
+ /* No target */
+ return;
+ }
+ if (level == 0) {
+ if (test_bit(&src->ipvp, IPVP_ACTIVITY) &&
+ test_bit(&src->ipvp, IPVP_SENSE)) {
+ /* Inactivate a active level-sensitive IRQ */
+ reset_bit(&src->ipvp, IPVP_ACTIVITY);
+ }
+ } else {
+ if (test_bit(&src->ipvp, IPVP_ACTIVITY)) {
+ /* Interrupt already pending */
+ return;
+ }
+ if (!test_bit(&src->ipvp, IPVP_MODE) ||
+ src->ide == (1 << src->last_cpu)) {
+ /* Directed delivery mode */
+ for (i = 0; i < opp->nb_cpus; i++) {
+ if (test_bit(&src->ide, i))
+ IRQ_local_pipe(opp, i, n_IRQ);
+ }
+ } else {
+ /* Distributed delivery mode */
+ for (i = src->last_cpu; i < src->last_cpu; i++) {
+ if (i == MAX_IRQ)
+ i = 0;
+ if (test_bit(&src->ide, i)) {
+ IRQ_local_pipe(opp, i, n_IRQ);
+ src->last_cpu = i;
+ break;
+ }
+ }
+ }
+ }
+}
+
+static void openpic_reset (openpic_t *opp)
+{
+ int i;
+
+ opp->glbc = 0x80000000;
+ /* Initialise controler registers */
+ opp->frep = ((EXT_IRQ - 1) << 16) | ((MAX_CPU - 1) << 8) | VID;
+ opp->veni = VENI;
+ opp->spve = 0x000000FF;
+ opp->tifr = 0x003F7A00;
+ /* ? */
+ opp->micr = 0x00000000;
+ /* Initialise IRQ sources */
+ for (i = 0; i < MAX_IRQ; i++) {
+ opp->src[i].ipvp = 0xA0000000;
+ opp->src[i].ide = 0x00000000;
+ }
+ /* Initialise IRQ destinations */
+ for (i = 0; i < opp->nb_cpus; i++) {
+ opp->dst[i].pctp = 0x0000000F;
+ opp->dst[i].pcsr = 0x00000000;
+ memset(&opp->dst[i].raised, 0, sizeof(IRQ_queue_t));
+ memset(&opp->dst[i].servicing, 0, sizeof(IRQ_queue_t));
+ }
+ /* Initialise timers */
+ for (i = 0; i < MAX_TMR; i++) {
+ opp->timers[i].ticc = 0x00000000;
+ opp->timers[i].tibc = 0x80000000;
+ }
+ /* Initialise doorbells */
+#if MAX_DBL > 0
+ opp->dar = 0x00000000;
+ for (i = 0; i < MAX_DBL; i++) {
+ opp->doorbells[i].dmr = 0x00000000;
+ }
+#endif
+ /* Initialise mailboxes */
+#if MAX_MBX > 0
+ for (i = 0; i < MAX_MBX; i++) { /* ? */
+ opp->mailboxes[i].mbr = 0x00000000;
+ }
+#endif
+ /* Go out of RESET state */
+ opp->glbc = 0x00000000;
+}
+
+static inline uint32_t read_IRQreg (openpic_t *opp, int n_IRQ, uint32_t reg)
+{
+ uint32_t retval;
+
+ switch (reg) {
+ case IRQ_IPVP:
+ retval = opp->src[n_IRQ].ipvp;
+ break;
+ case IRQ_IDE:
+ retval = opp->src[n_IRQ].ide;
+ break;
+ }
+
+ return retval;
+}
+
+static inline void write_IRQreg (openpic_t *opp, int n_IRQ,
+ uint32_t reg, uint32_t val)
+{
+ uint32_t tmp;
+
+ switch (reg) {
+ case IRQ_IPVP:
+ tmp = opp->src[n_IRQ].ipvp & 0x40000000;
+ if (tmp == 0) {
+ tmp |= val & 0x80000000;
+ if ((opp->src[n_IRQ].type & IRQ_EXTERNAL) != 0)
+ tmp |= val & 0x40C00000;
+ else if ((opp->src[n_IRQ].type & IRQ_TIMER) != 0)
+ tmp |= val & 0x00F00000;
+ } else {
+ tmp |= val & 0x80000000;
+ }
+ opp->src[n_IRQ].ipvp = tmp | (val & 0x000F00FF);
+ DPRINTF("Set IPVP %d to 0x%08x\n", n_IRQ, opp->src[n_IRQ].ipvp);
+ break;
+ case IRQ_IDE:
+ tmp = val & 0xC0000000;
+ tmp |= val & ((1 << MAX_CPU) - 1);
+ opp->src[n_IRQ].ide = tmp;
+ DPRINTF("Set IDE %d to 0x%08x\n", n_IRQ, opp->src[n_IRQ].ide);
+ break;
+ }
+}
+
+#if 0 // Code provision for Intel model
+#if MAX_DBL > 0
+static uint32_t read_doorbell_register (openpic_t *opp,
+ int n_dbl, uint32_t offset)
+{
+ uint32_t retval;
+
+ switch (offset) {
+ case DBL_IPVP_OFFSET:
+ retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP);
+ break;
+ case DBL_IDE_OFFSET:
+ retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE);
+ break;
+ case DBL_DMR_OFFSET:
+ retval = opp->doorbells[n_dbl].dmr;
+ break;
+ }
+
+ return retval;
+}
+
+static void write_doorbell_register (penpic_t *opp, int n_dbl,
+ uint32_t offset, uint32_t value)
+{
+ switch (offset) {
+ case DBL_IVPR_OFFSET:
+ write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP, value);
+ break;
+ case DBL_IDE_OFFSET:
+ write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE, value);
+ break;
+ case DBL_DMR_OFFSET:
+ opp->doorbells[n_dbl].dmr = value;
+ break;
+ }
+}
+#endif
+
+#if MAX_MBX > 0
+static uint32_t read_mailbox_register (openpic_t *opp,
+ int n_mbx, uint32_t offset)
+{
+ uint32_t retval;
+
+ switch (offset) {
+ case MBX_MBR_OFFSET:
+ retval = opp->mailboxes[n_mbx].mbr;
+ break;
+ case MBX_IVPR_OFFSET:
+ retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP);
+ break;
+ case MBX_DMR_OFFSET:
+ retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE);
+ break;
+ }
+
+ return retval;
+}
+
+static void write_mailbox_register (openpic_t *opp, int n_mbx,
+ uint32_t address, uint32_t value)
+{
+ switch (offset) {
+ case MBX_MBR_OFFSET:
+ opp->mailboxes[n_mbx].mbr = value;
+ break;
+ case MBX_IVPR_OFFSET:
+ write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP, value);
+ break;
+ case MBX_DMR_OFFSET:
+ write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE, value);
+ break;
+ }
+}
+#endif
+#endif /* 0 : Code provision for Intel model */
+
+static void openpic_gbl_write (void *opaque, uint32_t addr, uint32_t val)
+{
+ openpic_t *opp = opaque;
+
+ DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
+ if (addr & 0xF)
+ return;
+#if defined OPENPIC_SWAP
+ val = bswap32(val);
+#endif
+ addr &= 0xFF;
+ switch (addr) {
+ case 0x00: /* FREP */
+ break;
+ case 0x20: /* GLBC */
+ if (val & 0x80000000)
+ openpic_reset(opp);
+ opp->glbc = val & ~0x80000000;
+ break;
+ case 0x80: /* VENI */
+ break;
+ case 0x90: /* PINT */
+ /* XXX: Should be able to reset any CPU */
+ if (val & 1) {
+ DPRINTF("Reset CPU IRQ\n");
+ // cpu_interrupt(cpu_single_env, CPU_INTERRUPT_RESET);
+ }
+ break;
+#if MAX_IPI > 0
+ case 0xA0: /* IPI_IPVP */
+ case 0xB0:
+ case 0xC0:
+ case 0xD0:
+ {
+ int idx;
+ idx = (addr - 0xA0) >> 4;
+ write_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IPVP, val);
+ }
+ break;
+#endif
+ case 0xE0: /* SPVE */
+ opp->spve = val & 0x000000FF;
+ break;
+ case 0xF0: /* TIFR */
+ opp->tifr = val;
+ break;
+ default:
+ break;
+ }
+}
+
+static uint32_t openpic_gbl_read (void *opaque, uint32_t addr)
+{
+ openpic_t *opp = opaque;
+ uint32_t retval;
+
+ DPRINTF("%s: addr %08x\n", __func__, addr);
+ retval = 0xFFFFFFFF;
+ if (addr & 0xF)
+ return retval;
+ addr &= 0xFF;
+ switch (addr) {
+ case 0x00: /* FREP */
+ retval = opp->frep;
+ break;
+ case 0x20: /* GLBC */
+ retval = opp->glbc;
+ break;
+ case 0x80: /* VENI */
+ retval = opp->veni;
+ break;
+ case 0x90: /* PINT */
+ retval = 0x00000000;
+ break;
+#if MAX_IPI > 0
+ case 0xA0: /* IPI_IPVP */
+ case 0xB0:
+ case 0xC0:
+ case 0xD0:
+ {
+ int idx;
+ idx = (addr - 0xA0) >> 4;
+ retval = read_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IPVP);
+ }
+ break;
+#endif
+ case 0xE0: /* SPVE */
+ retval = opp->spve;
+ break;
+ case 0xF0: /* TIFR */
+ retval = opp->tifr;
+ break;
+ default:
+ break;
+ }
+ DPRINTF("%s: => %08x\n", __func__, retval);
+#if defined OPENPIC_SWAP
+ retval = bswap32(retval);
+#endif
+
+ return retval;
+}
+
+static void openpic_timer_write (void *opaque, uint32_t addr, uint32_t val)
+{
+ openpic_t *opp = opaque;
+ int idx;
+
+ DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
+ if (addr & 0xF)
+ return;
+#if defined OPENPIC_SWAP
+ val = bswap32(val);
+#endif
+ addr -= 0x1100;
+ addr &= 0xFFFF;
+ idx = (addr & 0xFFF0) >> 6;
+ addr = addr & 0x30;
+ switch (addr) {
+ case 0x00: /* TICC */
+ break;
+ case 0x10: /* TIBC */
+ if ((opp->timers[idx].ticc & 0x80000000) != 0 &&
+ (val & 0x800000000) == 0 &&
+ (opp->timers[idx].tibc & 0x80000000) != 0)
+ opp->timers[idx].ticc &= ~0x80000000;
+ opp->timers[idx].tibc = val;
+ break;
+ case 0x20: /* TIVP */
+ write_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IPVP, val);
+ break;
+ case 0x30: /* TIDE */
+ write_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IDE, val);
+ break;
+ }
+}
+
+static uint32_t openpic_timer_read (void *opaque, uint32_t addr)
+{
+ openpic_t *opp = opaque;
+ uint32_t retval;
+ int idx;
+
+ DPRINTF("%s: addr %08x\n", __func__, addr);
+ retval = 0xFFFFFFFF;
+ if (addr & 0xF)
+ return retval;
+ addr -= 0x1100;
+ addr &= 0xFFFF;
+ idx = (addr & 0xFFF0) >> 6;
+ addr = addr & 0x30;
+ switch (addr) {
+ case 0x00: /* TICC */
+ retval = opp->timers[idx].ticc;
+ break;
+ case 0x10: /* TIBC */
+ retval = opp->timers[idx].tibc;
+ break;
+ case 0x20: /* TIPV */
+ retval = read_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IPVP);
+ break;
+ case 0x30: /* TIDE */
+ retval = read_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IDE);
+ break;
+ }
+ DPRINTF("%s: => %08x\n", __func__, retval);
+#if defined OPENPIC_SWAP
+ retval = bswap32(retval);
+#endif
+
+ return retval;
+}
+
+static void openpic_src_write (void *opaque, uint32_t addr, uint32_t val)
+{
+ openpic_t *opp = opaque;
+ int idx;
+
+ DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
+ if (addr & 0xF)
+ return;
+#if defined OPENPIC_SWAP
+ val = tswap32(val);
+#endif
+ addr = addr & 0xFFF0;
+ idx = addr >> 5;
+ if (addr & 0x10) {
+ /* EXDE / IFEDE / IEEDE */
+ write_IRQreg(opp, idx, IRQ_IDE, val);
+ } else {
+ /* EXVP / IFEVP / IEEVP */
+ write_IRQreg(opp, idx, IRQ_IPVP, val);
+ }
+}
+
+static uint32_t openpic_src_read (void *opaque, uint32_t addr)
+{
+ openpic_t *opp = opaque;
+ uint32_t retval;
+ int idx;
+
+ DPRINTF("%s: addr %08x\n", __func__, addr);
+ retval = 0xFFFFFFFF;
+ if (addr & 0xF)
+ return retval;
+ addr = addr & 0xFFF0;
+ idx = addr >> 5;
+ if (addr & 0x10) {
+ /* EXDE / IFEDE / IEEDE */
+ retval = read_IRQreg(opp, idx, IRQ_IDE);
+ } else {
+ /* EXVP / IFEVP / IEEVP */
+ retval = read_IRQreg(opp, idx, IRQ_IPVP);
+ }
+ DPRINTF("%s: => %08x\n", __func__, retval);
+#if defined OPENPIC_SWAP
+ retval = tswap32(retval);
+#endif
+
+ return retval;
+}
+
+static void openpic_cpu_write (void *opaque, uint32_t addr, uint32_t val)
+{
+ openpic_t *opp = opaque;
+ IRQ_src_t *src;
+ IRQ_dst_t *dst;
+ int idx, n_IRQ;
+
+ DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
+ if (addr & 0xF)
+ return;
+#if defined OPENPIC_SWAP
+ val = bswap32(val);
+#endif
+ addr &= 0x1FFF0;
+ idx = addr / 0x1000;
+ dst = &opp->dst[idx];
+ addr &= 0xFF0;
+ switch (addr) {
+#if MAX_IPI > 0
+ case 0x40: /* PIPD */
+ case 0x50:
+ case 0x60:
+ case 0x70:
+ idx = (addr - 0x40) >> 4;
+ write_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IDE, val);
+ openpic_set_IRQ(opp, IRQ_IPI0 + idx, 1);
+ openpic_set_IRQ(opp, IRQ_IPI0 + idx, 0);
+ break;
+#endif
+ case 0x80: /* PCTP */
+ dst->pctp = val & 0x0000000F;
+ break;
+ case 0x90: /* WHOAMI */
+ /* Read-only register */
+ break;
+ case 0xA0: /* PIAC */
+ /* Read-only register */
+ break;
+ case 0xB0: /* PEOI */
+ DPRINTF("PEOI\n");
+ n_IRQ = IRQ_get_next(opp, &dst->servicing);
+ IRQ_resetbit(&dst->servicing, n_IRQ);
+ dst->servicing.next = -1;
+ src = &opp->src[n_IRQ];
+ /* Set up next servicing IRQ */
+ IRQ_get_next(opp, &dst->servicing);
+ /* Check queued interrupts. */
+ n_IRQ = IRQ_get_next(opp, &dst->raised);
+ if (n_IRQ != -1) {
+ src = &opp->src[n_IRQ];
+ if (IPVP_PRIORITY(src->ipvp) > dst->servicing.priority) {
+ DPRINTF("Raise CPU IRQ\n");
+ cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HARD);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static uint32_t openpic_cpu_read (void *opaque, uint32_t addr)
+{
+ openpic_t *opp = opaque;
+ IRQ_src_t *src;
+ IRQ_dst_t *dst;
+ uint32_t retval;
+ int idx, n_IRQ;
+
+ DPRINTF("%s: addr %08x\n", __func__, addr);
+ retval = 0xFFFFFFFF;
+ if (addr & 0xF)
+ return retval;
+ addr &= 0x1FFF0;
+ idx = addr / 0x1000;
+ dst = &opp->dst[idx];
+ addr &= 0xFF0;
+ switch (addr) {
+ case 0x80: /* PCTP */
+ retval = dst->pctp;
+ break;
+ case 0x90: /* WHOAMI */
+ retval = idx;
+ break;
+ case 0xA0: /* PIAC */
+ n_IRQ = IRQ_get_next(opp, &dst->raised);
+ DPRINTF("PIAC: irq=%d\n", n_IRQ);
+ if (n_IRQ == -1) {
+ /* No more interrupt pending */
+ retval = opp->spve;
+ } else {
+ src = &opp->src[n_IRQ];
+ if (!test_bit(&src->ipvp, IPVP_ACTIVITY) ||
+ !(IPVP_PRIORITY(src->ipvp) > dst->pctp)) {
+ /* - Spurious level-sensitive IRQ
+ * - Priorities has been changed
+ * and the pending IRQ isn't allowed anymore
+ */
+ reset_bit(&src->ipvp, IPVP_ACTIVITY);
+ retval = IPVP_VECTOR(opp->spve);
+ } else {
+ /* IRQ enter servicing state */
+ IRQ_setbit(&dst->servicing, n_IRQ);
+ retval = IPVP_VECTOR(src->ipvp);
+ }
+ IRQ_resetbit(&dst->raised, n_IRQ);
+ dst->raised.next = -1;
+ if (!test_bit(&src->ipvp, IPVP_SENSE))
+ reset_bit(&src->ipvp, IPVP_ACTIVITY);
+ }
+ break;
+ case 0xB0: /* PEOI */
+ retval = 0;
+ break;
+#if MAX_IPI > 0
+ case 0x40: /* IDE */
+ case 0x50:
+ idx = (addr - 0x40) >> 4;
+ retval = read_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IDE);
+ break;
+#endif
+ default:
+ break;
+ }
+ DPRINTF("%s: => %08x\n", __func__, retval);
+#if defined OPENPIC_SWAP
+ retval= bswap32(retval);
+#endif
+
+ return retval;
+}
+
+static void openpic_buggy_write (void *opaque,
+ target_phys_addr_t addr, uint32_t val)
+{
+ printf("Invalid OPENPIC write access !\n");
+}
+
+static uint32_t openpic_buggy_read (void *opaque, target_phys_addr_t addr)
+{
+ printf("Invalid OPENPIC read access !\n");
+
+ return -1;
+}
+
+static void openpic_writel (void *opaque,
+ target_phys_addr_t addr, uint32_t val)
+{
+ openpic_t *opp = opaque;
+
+ addr &= 0x3FFFF;
+ DPRINTF("%s: offset %08lx val: %08x\n", __func__, addr, val);
+ if (addr < 0x1100) {
+ /* Global registers */
+ openpic_gbl_write(opp, addr, val);
+ } else if (addr < 0x10000) {
+ /* Timers registers */
+ openpic_timer_write(opp, addr, val);
+ } else if (addr < 0x20000) {
+ /* Source registers */
+ openpic_src_write(opp, addr, val);
+ } else {
+ /* CPU registers */
+ openpic_cpu_write(opp, addr, val);
+ }
+}
+
+static uint32_t openpic_readl (void *opaque,target_phys_addr_t addr)
+{
+ openpic_t *opp = opaque;
+ uint32_t retval;
+
+ addr &= 0x3FFFF;
+ DPRINTF("%s: offset %08lx\n", __func__, addr);
+ if (addr < 0x1100) {
+ /* Global registers */
+ retval = openpic_gbl_read(opp, addr);
+ } else if (addr < 0x10000) {
+ /* Timers registers */
+ retval = openpic_timer_read(opp, addr);
+ } else if (addr < 0x20000) {
+ /* Source registers */
+ retval = openpic_src_read(opp, addr);
+ } else {
+ /* CPU registers */
+ retval = openpic_cpu_read(opp, addr);
+ }
+
+ return retval;
+}
+
+static CPUWriteMemoryFunc *openpic_write[] = {
+ &openpic_buggy_write,
+ &openpic_buggy_write,
+ &openpic_writel,
+};
+
+static CPUReadMemoryFunc *openpic_read[] = {
+ &openpic_buggy_read,
+ &openpic_buggy_read,
+ &openpic_readl,
+};
+
+static void openpic_map(PCIDevice *pci_dev, int region_num,
+ uint32_t addr, uint32_t size, int type)
+{
+ openpic_t *opp;
+ int opp_io_memory;
+
+ DPRINTF("Map OpenPIC\n");
+ opp = (openpic_t *)pci_dev;
+ /* Global registers */
+ DPRINTF("Register OPENPIC gbl %08x => %08x\n",
+ addr + 0x1000, addr + 0x1000 + 0x100);
+ /* Timer registers */
+ DPRINTF("Register OPENPIC timer %08x => %08x\n",
+ addr + 0x1100, addr + 0x1100 + 0x40 * MAX_TMR);
+ /* Interrupt source registers */
+ DPRINTF("Register OPENPIC src %08x => %08x\n",
+ addr + 0x10000, addr + 0x10000 + 0x20 * (EXT_IRQ + 2));
+ /* Per CPU registers */
+ DPRINTF("Register OPENPIC dst %08x => %08x\n",
+ addr + 0x20000, addr + 0x20000 + 0x1000 * MAX_CPU);
+ opp_io_memory = cpu_register_io_memory(0, openpic_read,
+ openpic_write, opp);
+ cpu_register_physical_memory(addr, 0x40000, opp_io_memory);
+#if 0 // Don't implement ISU for now
+ opp_io_memory = cpu_register_io_memory(0, openpic_src_read,
+ openpic_src_write);
+ cpu_register_physical_memory(isu_base, 0x20 * (EXT_IRQ + 2),
+ opp_io_memory);
+#endif
+}
+
+openpic_t *openpic_init (uint32_t isu_base, uint32_t idu_base, int nb_cpus)
+{
+ openpic_t *opp;
+ uint8_t *pci_conf;
+ int i, m;
+
+ /* XXX: for now, only one CPU is supported */
+ if (nb_cpus != 1)
+ return NULL;
+ opp = (openpic_t *)pci_register_device("OpenPIC", sizeof(openpic_t),
+ 0, -1, NULL, NULL);
+ if (opp == NULL)
+ return NULL;
+ pci_conf = opp->pci_dev.config;
+ pci_conf[0x00] = 0x14; // IBM MPIC2
+ pci_conf[0x01] = 0x10;
+ pci_conf[0x02] = 0xFF;
+ pci_conf[0x03] = 0xFF;
+ pci_conf[0x0a] = 0x80; // PIC
+ pci_conf[0x0b] = 0x08;
+ pci_conf[0x0e] = 0x00; // header_type
+ pci_conf[0x3d] = 0x00; // no interrupt pin
+
+ /* Register I/O spaces */
+ pci_register_io_region((PCIDevice *)opp, 0, 0x40000,
+ PCI_ADDRESS_SPACE_MEM, &openpic_map);
+
+ isu_base &= 0xFFFC0000;
+ opp->nb_cpus = nb_cpus;
+ /* Set IRQ types */
+ for (i = 0; i < EXT_IRQ; i++) {
+ opp->src[i].type = IRQ_EXTERNAL;
+ }
+ for (; i < IRQ_TIM0; i++) {
+ opp->src[i].type = IRQ_SPECIAL;
+ }
+#if MAX_IPI > 0
+ m = IRQ_IPI0;
+#else
+ m = IRQ_DBL0;
+#endif
+ for (; i < m; i++) {
+ opp->src[i].type = IRQ_TIMER;
+ }
+ for (; i < MAX_IRQ; i++) {
+ opp->src[i].type = IRQ_INTERNAL;
+ }
+ openpic_reset(opp);
+
+ return opp;
+}
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